1,000 pCi/em* is about 300 acres. Only a very few acres are above 7,000 pCi/cm’, the level where cleanup in the past has been done (Langham, 1968). Much has been learned about Pu contamination during the 6 years that NAEG has been Studying these areas, but much more can yet be learned. These contaminated areas present an opportunity for solving many problems and, if at all possible, they should be preserved at least until the necessary research is accomplished and perhaps permanently if no cleanup is deemed necessary. 74